JavaScript Fundamentals Quiz

Question 1

Which statement about 'var', 'let', and 'const' is true?

Answer

var is block-scoped, let and const are function-scoped.

Answer

let allows re-declaration, var and const do not.

Answer

const variables cannot be reassigned after declaration.

Answer

All three are exactly the same in modern JavaScript.

Question 2

Which list contains only primitive data types in JavaScript?

Answer

string, number, boolean, array, object, null, undefined

Answer

string, number, boolean, null, undefined, symbol, bigint

Answer

integer, float, character, boolean, object, array

Answer

text, numeric, logical, list, dictionary, void

Description